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Castelli
Nanoflex Knee Warmers $59.95

Item # CST2615

Description

Block heaters for your well-oiled engine.

In rainy conditions, knee warmers suffer from the same problems that legwarmers do. Basically, the fabric absorbs water and their ability to keep your joints warm becomes compromised. Lucky for you, the Castelli Nanoflex Knee Warmers have remedied the issues that challenge knee warmers in cold and wet conditions.

Nanoflex is a proprietary Castelli fabric. The mill begins with Castelli's super-warm and ultra-stretchy Thermoflex fabric (used in many of its winter pieces) receiving an exterior coating of ultra-tiny nanofilaments of silicone fiber. These fibers create a near waterproof barrier to moisture, and raindrops run off the fabric without soaking through. Despite its water-resistant finish, Nanoflex fabric remains highly breathable, keeping you comfortable in almost any condition.

Silicone leg grippers keep the knee warmers in place on the hardest rides. But, keep in mind that they do run longer than some that we've seen -- more accurately, they run from mid-thigh to the bottom of the calf. Lastly, Castelli printed reflective logos at the knee and on the side of the calf in order to increase your visibility to motorists in low-light conditions.

The Castelli Nanoflex Knee Warmers are available in four sizes from Small to X-Large and in the colors Black, Red, and White. Please note that Castelli recommends wearing these warmers in temperatures ranging between 50 and 60 degrees Fahrenheit.

Here's what others have to say...

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Convertible is great, runs small

Familiarity:
I've used it once or twice and have initial impressions

Just got these for a fall fundraiser ride. Boy, am I glad I did. Started at about 45F with shorts and jersey, plus these, the related arm warmers and a Fawesome vest. Very comfy. It warmed up over the course of the ride to mid 60s. As it warmed up, I was able to shed first these knee warmers, then the arm warmers. Made it so that I was comfortable the entire ride, not the more usual under-dressed to start, over-dressed by the finish.

I'm 6', 185lbs. I got the L, and they fit ok. They are short. They rode up my calves, and I had to hoist them up a bit to keep them from sliding down out from under my shorts. Even so, they kept my knees warm.

Comment on Ian Duff's review:

Nanoflex fabric rocks

Gender:
Male

Familiarity:
I've put it through the wringer

Great fabric! Superior wind and water protection, and they're warmer than you would think. I have thermal knee warmers from PI and Canari that aren't as warm. They fit nice and snug but don't stretch as much as the Castelli Thermoflex warmers so they occasionally slip down, especially on long seated climbs, but honestly I've had similar issues with other brands. I just spray a little Mueller pre-tape on my thighs and they stay put.

Comment on patp1106724's review:

Great fabric - dissappointing pattern

Familiarity:
I've used it several times

Great fabric let down but a very basic pattern which results in them not feeling perfectly flat against the back of the knee - compare the pattern of this knee warmer (basically a tube) with something like the Assos kneewarmer and you'll see why these are let down in that department. The fabric is great though, water just beads off and they keep you warm even when it gets through (stops wind chill). Wish they charged the extra and used a more advanced pattern system (which would result in more fabric wastage and a higher cost) but more comfort. The fabric has so much potential!

Comment on Spider's review:

Pretty good

Familiarity:
I've used it several times

I have washed once with a gentle cycle and so far the letters have not peeled off, as mentioned by another reviewer. Also they do a great job of keeping the slop off, adequately waterproof. Only complaint was the last time I wore them the right leg on my quad slipped down below my bibs exposing my knee. Super annoying as you have to try and hike them up while riding. Although this was in about 38 degree weather and consistently raining for 3 hours. Otherwise, I think they do the job.

Comment on mhmp1152070's review:

Cas elli N n ex

Familiarity:
I've used it several times

These knee warmers look just like my title after only the second use. Half the letters fell/pealed off. I expected better from Castelli. The warmers did not fit my legs. They were loose on my quads and kept falling down. I think a smaller size would not have worked either since they were tight around mid-calf.